Наушники — Moondrop HARMON

The HARMON is a Moondrop in-ear monitor on a detachable cable that uses three dynamic drivers per side instead of the single-driver layout of the brand's simpler models. It belongs to the XTM series, combining a coaxial driver stack with a four-cavity acoustic crossover inside a shell produced by DLP 3D printing by HeyGears. Its list price at launch was USD 349.99. The box holds the earphones, a braided cable with interchangeable plugs, a carrying pouch, S, M and L ear tips, a manual, a certificate of quality and a warranty card.

Key specs that matter

All three drivers are 10 mm dynamic units. One handles the midrange and treble with a glass dome composite diaphragm, while two handle bass using flexible paper cone composite diaphragms, N52 magnets and CCAW voice coils. Moondrop quotes a full range of 10 Hz to 60 kHz and an effective band of 20 Hz to 20 kHz, measured to IEC 60318-4 at minus 3 dB. Impedance is 19 ohm plus or minus 15 percent at 1 kHz, and sensitivity is 114 dB per Vrms at 1 kHz. Total harmonic distortion is 0.1 percent or lower at 1 kHz and 94 dB. The earpieces use 0.78 mm 2-pin sockets, and the cable accepts either a 3.5 mm single-ended or a 4.4 mm balanced plug.

Engineering and use context

The mid-treble diaphragm is formed through a glass moulding process and sits on a flexible suspension. Moondrop describes it as only microns thick yet rigid and well damped, while remaining very light. The two bass drivers face each other in a horizontally opposed layout, a configuration the company has used in several models. Instead of an electrical crossover, the four independent cavities split the frequency bands acoustically, and the coaxial stacking is meant to keep phase coherent between drivers. Moondrop holds a patent on this arrangement and states that it keeps nonlinear distortion under 0.1 percent at 1 Pa sound pressure.

Pairing

Being easy to drive, the HARMON works from portable sources such as dongle DACs and digital audio players. Since the modular cable ships with both plug types, it connects to single-ended or balanced headphone outputs without buying another lead. Low background hiss and a player of low output impedance count for more with this sensitivity than high power.

Alternatives

The Moondrop Meteor sits above it in the same in-ear range, adding two balanced armatures and four planar drivers to a 13 mm dynamic woofer.